Kaci
A feminine name of unknown origins, possibly derived from the Irish name Casey.
Name Census estimates that about 9,752 living Americans carry the first name Kaci. It is a predominantly female name (98.4% of registrations). The average person named Kaci today is around 28 years old, and the year with the single highest number of Kaci births was 1990 (362 babies).
This page is the full Name Census profile for Kaci. Below you will find a gender breakdown showing how the name splits between male and female registrations, a year-by-year popularity chart stretching back to 1880, decade-level totals, the top US states for this name, its meaning and etymology, and a set of frequently asked questions with data-backed answers.
For a British comparison, Name Census UK has a UK baby-name profile for Kaci with official rankings and popularity over time.
Key insights
- • Although Kaci is used almost entirely for girls, the SSA data does show 163 boys registered with the name since 1880.
People living today
9.8K
~ 1 in 35,147 Americans
Peak year
1990
362 babies that year
Average age
28
years old
2024 SSA rank
#2,073
Tracked since 1965
Census
Kaci in the 2020 Census
The 2020 Census recorded 8,575 people with the first name Kaci, which placed it at #2,734 in the published first-name tables. This is a snapshot of people who already had the name at the time of the Census.
The SSA sections elsewhere on this page answer a different question: how often parents gave the name to babies over time. The "people living today" figure on this page is different again: it is a current estimate built from SSA birth records and age-based survival rates, so the two numbers are not expected to match exactly.
2020 Census rank
#2,734
National first-name rank
People counted
8.6K
8,575 in the published race/origin table
Per 100,000
2.8
People with this name in 2020
Largest reported group
White
78.7% of people with this name
Demographics
Ancestry and ethnicity for Kaci
In the 2020 Census race and Hispanic-origin table, the largest reported group for people named Kaci is White at 78.7%. The next largest groups are Black (9.9%) and Two or More Races (4.6%). These figures describe the people who had the name in 2020, not any inherent property of the name itself.
The bar chart below shows how people with the first name Kaci described their own race and ethnicity on the 2020 Census form. The Census Bureau groups responses into six broad categories: White, Black or African American, Hispanic or Latino, Asian and Pacific Islander, American Indian and Alaska Native, and Two or More Races. When a category has too few respondents for a given name, the Bureau suppresses the figure to protect individual privacy, which is why some names show fewer than six slices.
Percentages are shown so the breakdown is easy to read across every published category. Because the 2020 Census first-name file also includes raw headcounts for each group, Name Census can show those alongside the percentages in the legend and hover tooltip.
Keep in mind that these are self-reported numbers. A first name does not determine a person's race or ethnicity, and the distribution you see here reflects the specific population who happened to carry the name Kaci at the time of the 2020 Census, not any inherent property of the name itself.
- White78.7% · 6,747
- Black or African American9.9% · 853
- Two or more races4.6% · 396
- Hispanic or Latino3.7% · 320
- Asian and Pacific Islander1.8% · 154
- American Indian and Alaska Native1.2% · 105
Gender
Gender distribution for Kaci
Kaci leans heavily female at 98.4% of total registrations, but 163 boys have also been registered with the name over the years, giving it a small but present crossover presence.
Kaci as a male name
- Ranked #6,615 in 2024
- 13 male births in 2024
- Peak: 2022 (15 births)
Kaci as a female name
- Ranked #2,073 in 2024
- 93 female births in 2024
- Peak: 1990 (362 births)
2020 Census snapshot
In the 2020 Census sex table, Kaci leans strongly female. 8,436 people counted with this name were female (98.4%), compared with 139 male bearers (1.6%).
Popularity
Kaci: popularity over time
The SSA tracks Kaci from the 1960s through to the 2020s, spanning 7 decades of birth certificate data. The biggest single decade for the name was the 1990s, with 2,816 total registrations. Usage has dropped considerably from its 1990s peak. The most recent decade brought in only a fraction of the registrations that the name once attracted.
Babies born per year
Decades
Kaci by decade
The table below breaks the full SSA timeline into ten-year windows. Each row shows how many male and female babies were given the name Kaci during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
Geography
Where Kacis live
The SSA's state-level files cover 39 states and territories. Texas, California, Louisiana recorded the most babies named Kaci, while South Dakota, Montana, Massachusetts recorded the fewest. The average across all reporting states is about 184 registrations each.
Origin
Meaning and history of Kaci
The name Kaci is believed to have originated from the Slavic language family, specifically tracing its roots back to the Proto-Slavic word "kăčiti," which means "to curl" or "to twist." This linguistic connection suggests that the name may have initially been used to describe someone with curly or twisted hair.
During the Middle Ages, variations of the name Kaci were found in several Slavic regions, including present-day Poland, Czech Republic, and Slovakia. Historical records from this era indicate that the name was commonly used by both men and women, although its popularity varied across different regions and time periods.
One of the earliest known references to the name Kaci can be found in the 13th-century Czech chronicle "Chronica Boemorum" by Cosmas of Prague. In this text, a nobleman named Kaci is mentioned as a participant in a battle against the Prussians.
In the 15th century, a Polish noblewoman named Kaci Zamoyska gained prominence for her role in defending her family's castle during a siege. Her bravery and leadership earned her a place in Polish history and folklore.
During the Renaissance period, the name Kaci saw a resurgence in popularity, particularly in the Czech lands. One notable figure from this time was Kaci Vavřinec, a renowned Czech painter and engraver born in 1580. His works, including religious paintings and portraits, can still be found in various churches and museums across the region.
In the 19th century, a Russian writer and poet named Kaci Polonskaya (1819-1898) gained recognition for her lyrical works that explored themes of love, nature, and the human condition. Her poetry collections, such as "Stikhi" (Poems), were widely read and admired during her lifetime.
Another significant figure was Kaci Hajduk (1875-1957), a Serbian revolutionary and military leader who played a crucial role in the struggle for independence and the formation of Yugoslavia in the early 20th century. His bravery and leadership during the Balkan Wars and World War I earned him a place in Serbian national history.
These are just a few examples of notable individuals throughout history who bore the name Kaci, showcasing its rich cultural and linguistic heritage across various Slavic regions and time periods.
People
Kaci + last name combinations
How many people share a full name with Kaci as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with K
Other first names starting with K with a similar number of bearers.
FAQ
Kaci: questions and answers
How many people in the U.S. are named Kaci?
Name Census puts the figure at roughly 9,752 living Americans. We arrive at this by taking every SSA birth registration for Kaci going back to 1880 and adjusting each cohort for expected survival using CDC actuarial life tables. The result is an age-weighted living-bearer count, not a raw birth total. That works out to about 1 in 35,147 US residents.
Is Kaci a common name?
We classify Kaci as "Rare". It ranks above 97.7% of all first names in the SSA dataset by living bearers. Across the full history of the data, 10,084 babies have been registered with this name.
When was Kaci most popular?
The single biggest year for Kaci was 1990, when 362 babies received the name. The fact that the average living Kaci is about 28 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
How common was Kaci in the 2020 Census?
The published 2020 Census first-name tables recorded 8,575 people with the name Kaci, or 2.84 per 100,000 residents. That placed it at #2,734 in the national Census ranking for first names.
Why is the Census count different from the living estimate?
Because they measure different things. The Census figure is a count of people who had the name Kaci in 2020. The living estimate aims to answer a current question instead: how many people with the name are alive today, based on SSA birth records and age-based survival rates. Since one number is a 2020 snapshot and the other is a present-day estimate, they are not expected to be identical.
What does the Census say about the gender split for Kaci?
In the 2020 Census sex table, Kaci leans strongly female. 8,436 people counted with this name were female (98.4%), compared with 139 male bearers (1.6%). The Census view is a snapshot of people living with the name in 2020, while the SSA section above tracks births across time.
What does the Census say about the background of people named Kaci?
In the 2020 Census race and Hispanic-origin table, the largest reported group for people named Kaci is White at 78.7%. The next largest groups are Black (9.9%) and Two or More Races (4.6%). These figures describe the people who had the name in 2020, not any inherent property of the name itself. The percentages in the chart above come from self-reported race and Hispanic-origin responses in the 2020 Census.
Which group reports the name Kaci most often in the Census?
White is the largest reported group for people named Kaci in the 2020 Census, accounting for 78.7% (6,747 people in the published table).
Why can the Census sex total and race total differ slightly?
The Census Bureau published separate 2020 tables for sex and for race/Hispanic origin, and the released figures can differ slightly because of privacy protection in the public files. That is why this page treats the gender section and the race/origin section as two related snapshots instead of forcing them into one identical total.
Does every first name have Census demographic data?
No. The public Census first-name release only includes names that met the Bureau's publication rules, so many rarer names in the SSA files have no Census demographic snapshot. When that happens, the SSA trend, gender history, and state sections still appear, but the 2020 Census demographic sections are omitted.
What does the SSA popularity chart show?
The chart tracks births, not the number of people alive with the name today. Each point shows how many babies were given the name Kaci in that year. That makes it useful for spotting when the name rose, peaked, or faded.
Is Kaci a female name?
Yes, 98.4% of people registered as Kaci in the SSA data are female. You can see the full per-sex comparison in the gender distribution section above, which includes the latest year rank, birth count, and peak year for each sex.
Is Kaci still being used today?
Yes. The SSA still recorded Kaci in 2024, and the page above shows its latest-year rank where available. A name can be well past its peak and still remain in steady use, especially if it built up a large population over earlier decades.
Why can a name have a lot of living bearers even if it is not trendy now?
Because living-bearer counts and current baby-name popularity measure different things. A name like Kaci can build up a very large population over many decades, even if fewer parents are choosing it now than they did at its peak.
Where does this data come from?
First-name figures come from the Social Security Administration's national baby name files, which cover every name on a birth certificate from 1880 to 2024. Living-bearer estimates layer in CDC actuarial life tables broken out by sex to account for mortality. The population baseline (342,754,338) is the Census Bureau's latest national estimate. You can read the full calculation on our methodology page.
How many people have Kaci as a first name?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.